Yarn winding apparatus



Nov. 21, 1967 G, BREHM 3,353,760

YARN WINDING APPARATUS Filed May 14, 1965 M55 2629 3940 45 M 1H Z2 INVENIIORQ Gusmv Bee/m BY u/M3, W 1 &@ v

United States Patent ABSTRACT OF THE DISCLOSURE Yarn winding apparatus with means automatically shifting the stroke of a traversing yarn guide carrying crosshead.

This invention relates to thread or yarn winding apparatus, and more particularly, to such apparatus which are equipped for automatic shifting of the stroke of a thread feeder thereon.

It is known to provide feeder drive mechanisms for thread winding apparatus in which reciprocating movement of a rod, on which thread guides are carried, is produced by operation of a sliding cross-head in a guide member, either by means of an eccentric and crank drive, or directly by means of a grooved drum into the groove of which a roller or cam is positioned. In the case of the drum, the change of stroke usually occurs due to slow reciprocating movement of the drum itself along the length of the stroke. This arrangement, however, is imbued with particular disadvantages in that the forces eifective at the points of reversal of the stroke adversely affect the stroke reversal mechanism contributing to excessive wear and play, as well as chatter and vibration.

Accordingly, I have conceived by my invention a novel thread or yarn windingapparatus which effectively eliminates the foregoing difficulties and disadvantages.

In essence, my contribution is based upon recognition of the fact that the aforementioned problems can be eliminated by effectively maintaining the drum against reciprocating movement while merely rotating same, and incorporating the stroke shift device into the cross-head or slide mechanism as a quasi-passive element.

Thus, as a feature of my invention, I provide, in a device of the class described, a drum arranged to rotate about its central longitudinal axis, a slide or cross-head adapted to reciprocate, means translating rotary movement of the drum into reciprocating movement of the cross-head, and means effecting and maintaining the desired stroke displacement of the cross-head with each stroke. 7

The drum may have a groove formed on its surface by which to receive a roller secured to the slide or cross-head to shift same reciprocally along the length of the desired stroke as by a camming action upon rotation of the drum. Actually, the cross-head may be arranged to shift annularly relatively to a shaft passing through it and connected eccentrically to the roller engaging the drum groove. This annular shifting may, for example, be effected by so forming the guide as to cooperate with the cross-head to rotate the cross head shaft a desired annular distance on each stroke through a one-way clutch. Because of the eccentric relationship of the cross-head shaft and the roller, a shift of position of the cross-head, and thus the thread guides attached thereto, will be achieved at each stroke.

There has thus been outlined, rather broadly, the more important features of the invention in order that the detailed description thereof that follows may be better understood, and in order that the present contribution to the art may be better appreciated. There are, of course,

3,353,760 Patented Nov. 21, 1967 additional features of the invention that will be described hereinafter and which will form the subject of the claims appended hereto. Those skilled in the art will appreciate that the conception upon which this disclosure is based may readily be utilized as a basis for the designing of other structures for carrying out the several purposes of the invention. It is important, therefore, that the claims be regarded as including such equivalent construction as do not depart from the spirit and scope of the invention.

A specific embodiment of the invention has been chosen for purposes of illustration and description, and is shown in the accompanying drawings, forming a part of the specification, wherein:

FIG. 1 is an elevational view illustrating an embodiment of my invention;

FIG. 2 is a top view illustrating portions of the structure of FIG. 1, and

FIG. 3 is a cross-sectional view taken along the lines 3-3 of FIG. 1.

Referring now to the drawings, there is shown a slide or cross-head 10 arranged to slide along a pair of parallel bars 11 and 12. The cross-head 10 is bored as at 14; and within this bore I position a needle bearing 15 by which to insert a shaft 16 for rotation relatively to the cross-head 10. The shaft 16 is held against axial movement by a plate 17 at one end of the bore, and a snap-ring and groove 18 at the other end. At one end of the shaft 16, I provide a projecting pivot 19 which is formed eccentric-ally relatively to the shaft; and I mount this pivot by means of a ball bearing 24 in a groove 20 formed in the surface 21 of a cylindrical drum 22. The drum 22 is in turn mounted for rotation about its central longitudinal axis 25, as shown in FIG. 2, and the groove 20 is arranged to cam the pivot 19 as desired when the drum is rotated.

At the other end of the shaft 16, I provide a projecting pivot 26 upon which is seated a one-way clutch 27 consisting of outer and inner rings 29 and '30, respectively and clutch rollers 31 therebetween. The outer ring 29 is press fitted into an opening in a transfer lever 32; and the inner ring 30 is fixed to the pivot 26 by means of a key 34. The clutch 27 is fixed against axial movement relatively to the shaft 16 by means of a plate 35 abutting its outer end and secured in place by a snap-ring and groove 36.

The right hand end of the lever 32, as viewed in FIGS. 1 and 3, is through bored as at 36 for receipt, in press fit, of a pin 37 which in turn supports a ball bearing 39 secured against axial movement by a snap-ring and groove 40. Thus, it is apparent that the pin 37 and lever 32 together with the clutch 27 form a one-way crank for the cross-head shaft 16. The bearing 39 seats in an inclined slot 41 formed in a guide plate 42 for a purpose to be later described.

The cross-head 10 has a threaded bore 44 in which a rod 45 is securely threaded, the rod carrying the thread guides (not shown) for winding the thread on a spool, likewise not shown.

In order that the forces effective on the eccentric pivot 19 and bearing 24, as well as the turning impulses caused by the eccentric relationship of the pivot 19 and shaft 16, cause no undesirable rotation of the shaft 16, I provide a counterbore 46, coaxial with bore 14 for reception of a brake 47. This brake may, for example, comprise four plates 49 and a spacer plate 50 positioned in the counterbore and retained under pressure by a plate 51. The braking force exerted by the brake 47 is somewhat greater than the greatest turning force effective on the pivot 19 and bearing 24, as aforesaid; but the annular force transmitted through the one-way clutch 27 is greater than the breaking force.

In operation, it will be seen that rotation of the drum 22 causes its groove 20 to exert a camming action on the pivot 19 thus toshift the cross-head 10 reciprocally under guidance of the slot 41 in the plate 42. Because the slot 41 is inclined downwardly and to the right, as shown in FIG. 1, and the lever 29 is keyed to the pivot 26, the one-way clutch 27 permits the pivot 26 and shaft 16 to be turned in the direction indicated by the arrow in FIG. 1 upon movement of the cross-head to the right; but slips on the return excursion. Thus, the shaft 16 rotates a few degrees on each stroke so that continued reciprocating movement of the cross-head effects a step-by-step annular movement of the shaft 16. It will be understood by those persons skilled in the art that the eccentric relationship of the shaft 16 and pivot 19, and the step-by-step rotation of the shaft 16 causes a step-by-step eccentric displacemerit of the cross-head relatively to pivot 19 thus in turn causing a similar displacement of the rod 45 and thread guides.

From the foregoing description it will be seen that I contribute a novel thread or yarn winding apparatus according to which the forces effective at the points of reversal of the stroke do not adversely affect the stroke reversal mechanism. Thus, it will be seen that the drum of my mechanism does not itself shift, but rather is maintained in place, and that the stroke shift is incorporated into the cross-head to effect a step-by-step rotation of the cross-head shaft.

I believe that the construction and operation of my novel yarn winding apparatus will now be understood and that the advantages of my invention will be fully appreciated by those persons skilled in the art.

I now claim:

1. Apparatus of the class described comprising, a grooved drum, means rotating said drum about its central longitudinal axis, a cross-head, yarn guide means carried by said cross-head, a shaft supporting said cross-head and having an eccentric pivot extending from one end and into the grove of said drum whereby rotation of said drum shifts said cross-head reciprocally, crank means comprising a lever and pin mounted on the other end of said shaft, a one-way clutch between said crank means and shaft to allow rotation of said shaft in one direction only, means including a plate formed with a slot angularly disposed relatively to said drum axis acting on said crank means to rotate said shaft through said clutch a desired annular distance upon each stroke of said cross-head, and brake means preventing undesirable rotation of said shaft, the braking force being greater than the rotational force exerted by said eccentric shaft pivot.

2. Apparatus of the class described comprising: a cross-head, yarn guide means carried by said cross-head, drive means shifting said cross-head in reciprocating movement, a shaft having an eccentric portion connecting said cross-head and drive means, crank means, a clutch connecting said crank means and shaft to allow rotation of said shaft in one direction only, and means including a plate formed with a slot angularly disposed relatively to the path of movement of said cross-head for guiding said crank means to effect rotation of said shaft in said one direction.

3. Apparatus of the class described comprising: a grooved drum, means rotating said drum about its longitudinal axis, a cross-head, yarn guide means carried by said cross-head, means guiding said cross-head for reciprocating movement, a shaft supporting said cross-head and having an eccentric pivot extending therefrom and into the groove of said drum whereby rotation of said drum shifts said crosshead reciprocally, a crank means, a one-way clutch connecting said crank means and shaft to allow rotation of said shaft in one direction only, and means including a plate formed with a slot angularly disposed relatively to said drum axis for guiding said crank means to effect rotation of said shaft in said one direction.

4. Apparatus of the class described comprising: a grooved drum, means rotating said drum about its central longitudinal axis, a cross-head, yarn guide means carried by said cross-head, a shaft supporting said cross-head and hayingan eccentric pivot extending from one end and into the groove of said drum whereby rotation of said drum shifts said cross-head reciprocally, crank means comprising a lever and pin mounted on the other end of said shaft, a one-way clutch between said crank means and shaft to allow rotation of said shaft in one direction only, and means including a plate formed with a slot angularly disposed relatively to said drum axis acting on said crank means to rotate said shaft through said clutch a desired annular distance upon each stroke of said crosshead.

References Cited UNITED STATES PATENTS I 2,185,309 1/1940 Pierce 242-1583 2,433,304 12/1947 Stream 242-43 2,705,598 4/1955 Bauer et a1 242-43 2,858,993 11/1958 Siegenthaler 242-431 STANLEY N. GILREATH, Primary Examiner. 

1. APPARATUS OF THE CLASS DESCRIBED COMPRISING, A GROOVE DRUM, MEANS ROTATING SAID DRUM ABOUT ITS CENTRAL LONGITUDINAL AXIS, A CROSS-HEAD, YARN GUIDE MEANS CARRIED BY SAID CROSS-HEAD, A SHAFT SUPPORTING SAID CROSS-HEAD AND HAVING AN ECCENTRIC PIVOT EXTENDING FROM ONE END AND INTO THE GROVE OF SAID DRUM WHEREBY ROTATION OF SAID DRUM SHIFTS SAID CROSS-HEAD RECIPROCALLY, CRANK MEANS COMPRISING A LEVER AND PIN MOUNTED ON THE OTHER END OF SAID SHAFT, A ONE-WAY CLUTCH BETWEEN SAID CRANK MEANS AND SHAFT TO ALLOW ROTATION OF SAID SHAFT IN ONE DIRECTION ONLY, MEANS INCLUDING A PLATE FORMED WITH A SLOT ANGULARLY DISPOSED RELATIVELY TO SAID DRUM AXIS ACTING ON SAID CRANK MEANS TO ROTATE SAID SHAFT THROUGH SAID CLUTCH A DESIRED ANNULAR DISTANCE UPON EACH STROKE OF SAID CROSS-HEAD, AND BRAKE MEANS PREVENTING UNDESIRABLE ROTATION OF SAID SHAFT, THE BRAKING FORCE BEING GREATER THAN THE ROTATIONAL FORCE EXERTED BY SAID ECCENTRIC SHAFT PIVOT. 